iPrint Appliance 5.x SSL Cert renewal issue

I am attempting to renew the SSL certificates for my iPrint Appliance. When I generate the CSR and upload it to my CA to generate the certificate needed the iPrint appliance will error stating 
"A chain of trust cannot be formed with the uploaded certificates. Upload valid certificates."

I followed this link to create the certificates for the server: Certificate Installation on iPrint Appliance - iPrint Tips & Information - OpenText iPrint (microfocus.com)
I am using SSL.com as my Wildcard Certificate but am lost at to what I am doing wrong that the server doesn't like the uploaded certificate. 

Is there a new way this is supposed to be done?

Thanks

Richard